With a month of AC45 preparation under his belt Great Britain's Ben Ainslie sailed J.P. Morgan BAR to the front of the pack on the first day of fleet racing at the America's Cup World Series in San Francisco, USA.

Sailing in 15-knot winds late this afternoon, Ainslie's J.P. Morgan BAR crew won the first race by 17 seconds and followed it up with a third in the second race to lead the series with the high score of 21 points.

Five points behind in a three-way tie for second is ORACLE TEAM USA SPITHILL (Jimmy Spithill), winner of the second race, Artemis Racing - Red (Nathan Outteridge), which scored a pair of fourths, and ORACLE TEAM USA COUTTS (Russell Coutts), which scored a 3-5.

"We had a nice start and a good first race with Nathan and Team New Zealand. We hung on and are delighted to get our first win in this series," said Ainslie, who won his fourth Gold medal at the Olympics. "It comes down to practice and time in the boat, just like anything else. If you don't train and put the effort in you're not going to get the results."

Spithill, who won the August AC World Series San Francisco, was disappointed with the first race, an eighth place. He noted a bad start and a few mistakes around the racecourse, but rebounded in the second race to win going away by 37 seconds.

"It was good to get that one under our belt. The boys were fired up after the first race and they ground us up into a sizable lead," said Spithill. "Any team here can win. The boats are the same and it comes down to the team that sails well. Ben did a fantastic job and deserves to be leading. He sailed very well."

Outteridge, sailing his first fleet races with Artemis Racing, showed the steady hand he's shown in the past by scoring a pair of fourths.

"We had two really good starts," said Outteridge. "We focused hard on getting the good starts and it worked well for us. We need to work on the other little pieces of the race to stay ahead, but if we can sail every day like today, we'll be alright."

The fleet races were held later in the afternoon after the first two quarterfinal races in the match racing championship. Artemis Racing - White (Terry Hutchinson) defeated young upstart Team Korea (Peter Burling) while Emirates Team New Zealand (Dean Barker) beat Energy Team (Loïck Peyron).

Tom Burton (AUS) and Alison Young (GBR) hit the right note in the Laser and Laser Radial at ISAF Sailing World Cup Melbourne as they took out the top honours and qualification spots to the 2015 ISAF Sailing World Cup Final.

It was double Australian gold in the Paralympic classes. Matt Bugg (AUS) came out on top in the 2.4mR whilst London 2012 Paralympic SKUD18 gold medallists Dan Fitzgibbon and Liesl Tesch (AUS) were triumphant in the two person keelboat.

Lithuania's Juozas Bernotas came out on top in the Men's RS:X whilst Russia's Stefania Elfutina was triumphant in the Women's RS:X. Both sailors claim the first Abu Dhabi ISAF Sailing World Cup Final spots whilst Jock Calvert (AUS) and Joanna Sterling (AUS) picked up the Oceanic spots for the Emirati finale.

There was some fast paced action in the 49er and 49erFX Medal Races at ISAF Sailing World Cup Melbourne as Nathan Outteridge & Iain Jensen (AUS) and Maia & Ragna Agerup (NOR) claimed the honours and Abu Dhabi final spots.

A tight group of five young Papua New Guinean (PNG) Laser sailors are stepping up their 2015 Pacific Games competition program using this week's ISAF Sailing World Cup Melbourne. PNG is one of 33 countries represented at the important Oceanic event, the largest Olympic sailing regatta in the southern hemisphere.

Nicolai Sehested (DEN) and his TREFOR Match Racing Team clinched victory today at the Energa Sopot Match Race, Poland, the 10th stage and World Championship Event of the 2015 World Match Racing Tour (WMRT).

There was no stopping current, and five-time ISAF Match Racing World Champion Ian Williams (GBR), GAC Pindar today at the Energa Sopot Match Race as he swiftly dispatched his Quarter Final opponent Joachim Aschenbrenner (DEN) in three straight wins.

The International Sailing Federation (ISAF) continues to address concerns and is taking steps to ensure the health and safety of all athletes who will be competing in the upcoming Aquece Rio, Olympic Test Event and the Rio 2016 Olympic Sailing Competition.

Veteran Polish match racer and America's Cup helmsman Karol Jablonski skilfully played the gusty conditions today to lead the twelve strong field of teams at the end of Day 2 of Qualifying at the 2015 Energa Sopot Match Race.